Radiocabinet



March 30 .1926( H. E. CARLSON RADIocABINET ).ed M i525 March 30 1926.l Y 1,578,394

H. E. CARLSON RADIOCABINET Filed May 8, 1924 2 Sheets-Sheet 2 FQ. J Pg. 5 X

v f 5B 57 36 35' y 4 I 56 L f W WWE/V702? HOWARD E. CARLSON .To all whom t'may concern.:

Panarea Mar. 3o, 1926.

UNrr'r-.TD STATES l"PA,T1?.1-1'1* OFFICE.

. 'nowm '11. onnnsoN, or MINNEAPOLIS, immnso'rar BADIOCABINET.

.application ned nay s,

Be it known that I, HOWARD E. CARLSON, a citizen of the United States, residing at Minneapolis, in the countyof Hennepin and State of Minnesota, have invented cer.l

tain new and useful Improvements in Radiocabinets; and I do hereby declare the following to be a full, clear,'and exact description ofthe invention, such as will enable others skilled in the art to which it apper- .tains to make and use thel same.

This invention relates to radio apparatus vand particularly to radio cabinets designed -to enclose as much ofthe apparatus as poswitbier-.he ehbinet. 1.

sible without sacrificing the eiiiciency ofthe radio seti Y `The loud speaker horn and the aerial have been the most cumbersome and unsightly of the apparatusv used in radio sets andhave hitherto taken up considerable space in a room, as well-as considerably marring the decorative appearance of the same.

It Iisthe main object of this invention to provide a radio cabinet in which a rotatable loop aerial and loudspeaker horn, as well as all other pieces of lapparatus necessary in a receiving set, may be disposed, and per# mittingan aerial vto be used of approxi- 'mately lthe height and width of the inside ofthe cabinet.

Itv is amore specific object in such a cab inet to .provide a loopv aerial, 'which .will

l revolve' about the loud .speaker horn and other 'Pieces of radi@ apparatus mounted A jebjectof .the ,invention is to 'conneetedjl'y 'mount'` all-of the apparatus of 'the radio a removable paneh'. so thatl the entire @et may be relhved thel cabinetgby lifting''ontthe;p'a'nek-l vv invention consists f'lthenoveldevices and neuilly. speaking? 'the combinations lof devices hereinafter detations refer to similar arts throughout the- 'several views, and in w ich,

scribed and set'forth in the claims. Y

The invention is,- illustrated iny .the ac companying' drawings,'in which like no- Fig. 1 is a vertical section of the preferred form of' the .-invention, with the' movable position of one ofthe parts illustrated indotted lines;

Fig. 2 is a fragmentarycross Section taken on the line-2-v-2A of Fig. 1, with the moved position of some'parts being indicated in dotdlinqsv y. i A

mi. serial no. 711,839.

Fig.- 3 is an enlarged fragmentary verti- .A

Fig. 4 is a plan view of av modified crm of the invention, the top panel of the cabinetlJ being removed; and

Fig. 5 is an enlarged fragmlentary vertical section of the modied form illustrated in Fig. 4, Showing the operating mechanism of the revolubleloop aerial employed therein.

In the preferred form of the invention,

illustrated in Figs. 1, 2.and 3, a closed cabinet 6 is provided in which the entire radio set is disposed, including the aerial and loud speaker horn. This cabinethas preferably a lid 68L hinged to its top and pairs of hori-j zontally swinging doors 7 and 7 at its front, and rear sides, respectively. A flange y8 extends around the four sides of the topof the cabinet and a panel 9 fits into the recess Acal section taken on thel line 33`of Fi 1; I

within the flange and l closes -the top of the cabinet atthe top thereof. Oppositely disposed handles 9 arel secured to Athe top lof panel 9'by which the panel may be inserted or removed lfrom the cabinet. Adependingjournal member 11, preferably in the form of a'flanged Sleeve, is secured to theunder side of the panel -9l centrally thereof. A`

'cabinet, bein supported by small blocks 10 secured toit e inner four corners'v of the -80 ila'nged stud -12 is secured to 'thebottom 'of the. cabinet in vertical alignment with joura` second yjournal member, is adapte remevabfl. hes'eafcdpver Supported' by the Same Aeloop plane* .ofi .the time 14' ariundrwhioh' the .usual 'continuous' strandfof 14, are

habs '1aY and ,16, whih are" adapted. to" be mounted about the journal. members ll'and 13, respectively, adjacentftheftop' 'and b ot- -Woni The fram" 114 S .equip ed at top and bottom with Varpair of vertica ly aligned l tom of the cabinet, thus permitting rol tation of the aerial. 'The bridges 14"- are segmentally Shaped alongf their .outer edges to conform-to the radius of-revolution of 'the'` e aerial, thus economizing space in the cabinet.-

The hubs 15 and 16a-re constructedof insalati-ng material, suchas bakelite .or hard A mpwrtng '1.74 is Prfrf ably threadedto the end of journal member i 11 outside of the hub 15 and a relatively to said ring by small bolt-s 17a.

large supporting plate 1 8 is rigidly secured ,l A second ring 19 is threaded to the lower end of the journal member 13 below the hub 16 of the aerial, thus securing the aerial to-the panel 9 with freedomfor revolution. A second supporting plate 20 is secured to the top flange olf the cap or journal member 13 and is adapted to support the A and B batteries 21-a1rd 22 used in the radio set. AA loud Speaker horn 23 is also mounted within the cabinet with its smaller end and loud speaking unit dispdsedswithin the journal member 11 and secured to the bottom of the panel 9*preferably in alignment wltn the journal members 11 and 13. Thevarious other pieces of radio apparatus are mounted on the bottom of plate 18, such as the condensers 24 and 25, transformer 26,

inductance coil 27, amplifying tube 28,. and

' detector 29.

' A .pair of spaced conducting The regulation of the condensers 24 and 25 is provided for in the usual manner by means of the dials on the top of panel v9, in which `small shafts 31 are pivotally mounted having at their top ends dial knobs 32 rl`he revolution of the loop aerial is controlled by a third dial knob 35 pivotally mounted in the dial plate 36 and carrying the shaft 37 with its lower end equipped with the`pinion 38. Pinion 38 engages With a gear ring 39 secured about aerial is revoluble about the remaining apparat-us of the set, it is important that elfilcient electrical. connections be made .from

thefaerial to one of the condensers 24, which connections are ing manner.

rings 40 are secured aboutv the outer side of the hub 1 5 lto which .the 'two respective ends of the strands wound about the frame of the .aerial .y 14 are connected: One end of thefstrands is Asecured to-the electrial'connection member 41 on the outside of the hub 15 and the L"other end of the strands passes within the ginsulated liub 15l and is secured to a'countersunk electrical" connection 42 on the inner side of the hub 15. A pair of spring brushes '43, secured to electrical connection members 44 of thercondensers, are adapted to contact they rings 40, thus' permitting the condenser 24'to span the electrical current passedV through the Strands of the aerial.

The radio set preferably used is of the unv grounded type used extensively todayand they remaining pieces of radio apparatus,

ihithertofreferred to, areconnected together land with' the batteries in ythe usual st-andard mannergfg'lhe loud speakerhorn23 has its initi the batteries to be replaced.

andat their bottoml ends small pinions 33,`which engage with the regulating gears u 34 of the condensers.

provided' for inl the followflared end disposed directly behind the front doors 7 of the cabinet, so that the sound may be transmitted to the outside of the cabinet when the doors are open. The back doors 7"L permit the operator to adjust or repair the apparatus Within the cabinet and also perjournal member 11 is mounted to the under .side of the removable panel 9 and supports the upper hub 15 of the aerial as well as the plate 18with the several pieces of apparatus secured to its under side, 'and since the lower end of the aerial supports the removable cap or journal member 13 with the plate 2O secured thereto, itis obvious that the entire radio set and apparatus may be removed from the cabinet by revolving the aerial to a position on 4the diagonal of the bottom' of the cabinet, indicated by dotted lines in Fig. 2, and lifting up on the panel l9 by means of'the handle members 9a. This structure thus permits the entire radio set to be taken out for repair or replacement of parts. j

In order that a loudv speaker horn, of

relatively large size, may be employed, a

special horn is provided having its l.vertical sides segmentally cut away along a radius slightly smaller than thatA of the radius of the loop aerial, to permit the aerial to revolve about the same without interference therewith.

Since the Y The hub members15 and 16 o f the loop aerial are each equipped aty their sides with a pair of horizontally aligneda spacing members 45 extending perpendicularly to .the frame 14 of the aerial. These spacing members hold the strands 14a in spaced relation and divide and guide them around the hubs 15 and 16, so that the aerial may be revolved without interference therewith.

The top of the panel 9 forms a dial face or 'operating board for the set; when the hinged cover 6a is swung open and, by manipulating the differentwdial knobs in the proper manner, the set may be tuned .in and operated.' By means of the dial knob 35,

`the aerial may beV revolved to most effectively receive the 'Hertzian waves' broadcasted. The entire radio set, exclusive of the aerial, including the loud speaker horn, is mounted within the figure generated by the revolution ofthe aerial within the cabinet. Duc

to this structure, a 'loop' aerial of approxi mately the inside Width and height of the 'cabinet maybe employed.- `The unsightly and cumbersome aerial -and loud speaker horn are thus completely hiddenfrom view in a radio cabinet of the usual size, without impairing the efliciencyof therreceiving apparatus'. v

The modified form o f the invention, illustrated in'Figs. 4 and `5, is similar in principle to the preferred form, lbut varies.

considerably in structure `and arrangement of parts. 'In Fig. 4, the cabinet is indicated by the numeral 46, having its top removed `in\ which the A and B batteries of the set -wall of cabinet46 adjacent one end thereof and its flared end extends and communicates with an opening 50 in' the front wall of the cabinet at the otherend thereof. The' radio set proper', including the several pieces of apparatus, such as condenser-s, induction coil and am her detector and transformer, housed in the box 51 also -secured tothe inner side ofthe front Wall of the cabinet, preferably midway between its top and 4bottom and between the loud speaker unit and the flaring end of the speaker horn. The control dials 52 with the dial knobs extend at the outer side of the front wall of the cabinet, Wherev they maybe revulate'd, One `side of the loop aerial 53 of this modified form is ivotally mounted at top and bottom, best s own in Fig. .5', having a lower trunnionI 54 journaled in a pivot member 55 mounted on the bottom of cabinet 46 and has' an extended trunnion 56 journaled in the top panel 57 of the cabinet andextending therethrough and terminating in the dial knob 58 onv the outer side of panel 57. Revolution of the aerial 53 is thus controlled by the knob 58 and the aerial may be revolved about the loud speaker horn and radio apparatus in the box 5l, as illustrated by the dotted lines in Fig. 4f l In this modified form, as in the preferred form, the loud speaker horn and radio apparatus is entirely within the figure' generated by the revolution of the loop aerial and the entire radio set, including these devices, is disposed within the cabmet.

Actual usage has shown the invention to Bbe successful for the purposes intended and to receive radio messages efficiently.

It is to be understood that various changes in the form, details and arrangement of partsn may be made without departing from the seppe' of the invention. v What- I claim is:-'- 1 1 In a radio set, a stationary frame, a coil pivoted within said frame and means for mounting a plurality of pieces of apparatus within the figure generated by the revolui tion of said coil.

2. In a 'radio set,N -a stationary frame, a loud speaker horn secured to one side of said frame and extending therewithimand a loop aerial pivotally mounted within said .frame and adapted to be revolved about said horn.

3. Ina radio Set, a stationary' cabinetfay loop aerial pivotallymounted within said cabinet, and means supported from said cab-- inetvfor mounting a plurality of pieces of radio apparatus within the figure generated by the revolution of said aerial within said cabinet.

' 4. In a radio set, a `stationary cabinet having a pivot member supported from one 'of its Sides', a loop aerial mounted .within said cabinet having a co-operating pix-"ot member pivotally engaging said virst mentioned pivot member, and apparatus mountlng means secured to said first mentioned pivot member and disposed within the figure generated by the revolution of said aerial. 5. In a radio set, a closed cab1net,a loop aerlal mounted for revolutionA therein, a-

plurality of pieces lof radio apparatus` mounted in said cabinet enclosed Within the' ligure generated by the revolution of said aerial, and means disposed outside of said cabinet for revolving said aerial.

6. In a radio set, a closed cabinet having therein a pair of oppositely disposedl pivot members, a loop aerial mounted on 'said' pivot members for revolution within said cabinet, and means secured to the ends of said pivot members for mounting a plurality of pieces of radio apparatus supported from the ends of said pivot members Within the figure generated by the revolution of said aerial.

7. In a radio set, a closed cabinet having a pair of aligned pivot members Aprojecting therein from opposite sides, a loop aerial A vprovided at two of itsopposite ends with hubs mountedl about said pivot members to loop aerial mounted for revolution Within said cabinetand having hub portions pivotally mounted on said sleeves, and a loud speaker horn having its smaller'end secured and housedwithin one of said sleevesv and Vpermit said aerial tobe revolved within said wholly disposed Within the figurev generated by the revolution of said loop aerial.

9. Inga radio set, a stationary cabinet, a pair of oppositely alined. inwardly projecting sleeves-secured to opposite sides of said cabinet, a loop aerial disposed within said cabinet having hub portions pivotally mounted on said sleeves and carrying a plurality of strands, and means on the oppositev sides of the hub portions of said aerial for dividing said strandsand guiding the same' about said hub portions. v 10. In a radioset, a stationary cabinet comprising a main box-like structure and y volve Within said cabinet and means secured to the end of said pivot member for mount- A 'ing radio apparatus Within tlie figure gener.

ated by said aerial, whereby said aerial and apparatus ina-y be removed from said cabinet when said panel is lifted therefrom.

11. In -a radio set, a closed cabinet, a loop aerial mounted fora-evolution therein comprisiiig a rectangular shaped framework having at its four corners bridges .about which the anteniiastrands are Wound, said bridges being normal to the plane enclosed by the frame and being of segmental shape to conform with the rradius of revolution of the aerial. i

12. In a radio set, atstationary "frame,A a loop aerial `mounted to revolve within said frame and a lud speaker horn secured to said frame and disposed Within the figure generated bythe revolution of said aerial,

said horn having two of its opposite sides segmentallyciit to 'conform to the radius of revol'iitioii of said aerial.- i l 1n ltestimony whereof I affix my signature.

, HOWARD E. CARLSON. 

